/*
 * $Id: Console.java,v 1.7 2006/12/22 14:06:40 thiago Exp $
 * Copyright (C) 2003-2007 Kepler Project.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package org.keplerproject.luajava;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * Simple LuaJava console. This is also an example on how to use the Java side
 * of LuaJava and how to startup a LuaJava application.
 * 
 * @author Thiago Ponte
 */
public class Console {

    /**
     * Creates a console for user interaction.
     * 
     * @param args
     *            names of the lua files to be executed
     */
    public static void main(String[] args) {
        try {
            LuaState L = LuaStateFactory.newLuaState();
            L.openLibs();

            if (args.length > 0) {
                for (int i = 0; i < args.length; i++) {
                    int res = L.LloadFile(args[i]);
                    if (res == 0) {
                        res = L.pcall(0, 0, 0);
                    }
                    if (res != 0) {
                        throw new LuaException("Error on file: " + args[i] + ". " + L.toString(-1));
                    }
                }

                return;
            }

            System.out.println("API Lua Java - console mode.");

            BufferedReader inp = new BufferedReader(new InputStreamReader(System.in));

            String line;

            System.out.print("> ");
            while ((line = inp.readLine()) != null && !line.equals("exit")) {
                int ret = L.LloadBuffer(line.getBytes(), "from console");
                if (ret == 0) {
                    ret = L.pcall(0, 0, 0);
                }
                if (ret != 0) {
                    System.err.println("Error on line: " + line);
                    System.err.println(L.toString(-1));
                }
                System.out.print("> ");
            }

            L.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}